1. Department of Ophthalmology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
2. Department of Ophthalmology, Srinagarind Hospital, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
3. Department of Ophthalmology, Songklanagarind Hospital, Faculty of Medicine, Prince of Songkla University, Songkhla 90110, Thailand
4. Department of Ophthalmology, Phramongkutklao Hospital, Bangkok 10400; eDepartment of Ophthalmology, Mettapracharak Hospital, Nakornphathom 73210, Thailand
5. Department of Ophthalmology, Mettapracharak Hospital, Nakornphathom 73210, Thailand
6. Department of Ophthalmology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand